kernel/drivers/media/usb/ttusb-dec/ttusbdecfe.c

   1 /*
   2  * TTUSB DEC Frontend Driver
   3  *
   4  * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include "dvb_frontend.h"
  23 #include "ttusbdecfe.h"
  24
  25
  26 #define LOF_HI                  10600000
  27 #define LOF_LO                  9750000
  28
  29 struct ttusbdecfe_state {
  30
  31         /* configuration settings */
  32         const struct ttusbdecfe_config* config;
  33
  34         struct dvb_frontend frontend;
  35
  36         u8 hi_band;
  37         u8 voltage;
  38 };
  39
  40
  41 static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
  42                                        enum fe_status *status)
  43 {
  44         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  45                 FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  46         return 0;
  47 }
  48
  49
  50 static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
  51                                        enum fe_status *status)
  52 {
  53         struct ttusbdecfe_state* state = fe->demodulator_priv;
  54         u8 b[] = { 0x00, 0x00, 0x00, 0x00,
  55                    0x00, 0x00, 0x00, 0x00 };
  56         u8 result[4];
  57         int len, ret;
  58
  59         *status=0;
  60
  61         ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
  62         if(ret)
  63                 return ret;
  64
  65         if(len != 4) {
  66                 printk(KERN_ERR "%s: unexpected reply\n", __func__);
  67                 return -EIO;
  68         }
  69
  70         switch(result[3]) {
  71                 case 1:  /* not tuned yet */
  72                 case 2:  /* no signal/no lock*/
  73                         break;
  74                 case 3:  /* signal found and locked*/
  75                         *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
  76                         FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
  77                         break;
  78                 case 4:
  79                         *status = FE_TIMEDOUT;
  80                         break;
  81                 default:
  82                         pr_info("%s: returned unknown value: %d\n",
  83                                 __func__, result[3]);
  84                         return -EIO;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend *fe)
  91 {
  92         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  93         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
  94         u8 b[] = { 0x00, 0x00, 0x00, 0x03,
  95                    0x00, 0x00, 0x00, 0x00,
  96                    0x00, 0x00, 0x00, 0x01,
  97                    0x00, 0x00, 0x00, 0xff,
  98                    0x00, 0x00, 0x00, 0xff };
  99
 100         __be32 freq = htonl(p->frequency / 1000);
 101         memcpy(&b[4], &freq, sizeof (u32));
 102         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
 103
 104         return 0;
 105 }
 106
 107 static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
 108                                         struct dvb_frontend_tune_settings* fesettings)
 109 {
 110                 fesettings->min_delay_ms = 1500;
 111                 /* Drift compensation makes no sense for DVB-T */
 112                 fesettings->step_size = 0;
 113                 fesettings->max_drift = 0;
 114                 return 0;
 115 }
 116
 117 static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend *fe)
 118 {
 119         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 120         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 121
 122         u8 b[] = { 0x00, 0x00, 0x00, 0x01,
 123                    0x00, 0x00, 0x00, 0x00,
 124                    0x00, 0x00, 0x00, 0x01,
 125                    0x00, 0x00, 0x00, 0x00,
 126                    0x00, 0x00, 0x00, 0x00,
 127                    0x00, 0x00, 0x00, 0x00,
 128                    0x00, 0x00, 0x00, 0x00,
 129                    0x00, 0x00, 0x00, 0x00,
 130                    0x00, 0x00, 0x00, 0x00,
 131                    0x00, 0x00, 0x00, 0x00 };
 132         __be32 freq;
 133         __be32 sym_rate;
 134         __be32 band;
 135         __be32 lnb_voltage;
 136
 137         freq = htonl(p->frequency +
 138                (state->hi_band ? LOF_HI : LOF_LO));
 139         memcpy(&b[4], &freq, sizeof(u32));
 140         sym_rate = htonl(p->symbol_rate);
 141         memcpy(&b[12], &sym_rate, sizeof(u32));
 142         band = htonl(state->hi_band ? LOF_HI : LOF_LO);
 143         memcpy(&b[24], &band, sizeof(u32));
 144         lnb_voltage = htonl(state->voltage);
 145         memcpy(&b[28], &lnb_voltage, sizeof(u32));
 146
 147         state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
 148
 149         return 0;
 150 }
 151
 152 static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
 153 {
 154         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 155         u8 b[] = { 0x00, 0xff, 0x00, 0x00,
 156                    0x00, 0x00, 0x00, 0x00,
 157                    0x00, 0x00 };
 158
 159         if (cmd->msg_len > sizeof(b) - 4)
 160                 return -EINVAL;
 161
 162         memcpy(&b[4], cmd->msg, cmd->msg_len);
 163
 164         state->config->send_command(fe, 0x72,
 165                                     sizeof(b) - (6 - cmd->msg_len), b,
 166                                     NULL, NULL);
 167
 168         return 0;
 169 }
 170
 171
 172 static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend *fe,
 173                                     enum fe_sec_tone_mode tone)
 174 {
 175         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 176
 177         state->hi_band = (SEC_TONE_ON == tone);
 178
 179         return 0;
 180 }
 181
 182
 183 static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend *fe,
 184                                        enum fe_sec_voltage voltage)
 185 {
 186         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 187
 188         switch (voltage) {
 189         case SEC_VOLTAGE_13:
 190                 state->voltage = 13;
 191                 break;
 192         case SEC_VOLTAGE_18:
 193                 state->voltage = 18;
 194                 break;
 195         default:
 196                 return -EINVAL;
 197         }
 198
 199         return 0;
 200 }
 201
 202 static void ttusbdecfe_release(struct dvb_frontend* fe)
 203 {
 204         struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 205         kfree(state);
 206 }
 207
 208 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;
 209
 210 struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
 211 {
 212         struct ttusbdecfe_state* state = NULL;
 213
 214         /* allocate memory for the internal state */
 215         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 216         if (state == NULL)
 217                 return NULL;
 218
 219         /* setup the state */
 220         state->config = config;
 221
 222         /* create dvb_frontend */
 223         memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
 224         state->frontend.demodulator_priv = state;
 225         return &state->frontend;
 226 }
 227
 228 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;
 229
 230 struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
 231 {
 232         struct ttusbdecfe_state* state = NULL;
 233
 234         /* allocate memory for the internal state */
 235         state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 236         if (state == NULL)
 237                 return NULL;
 238
 239         /* setup the state */
 240         state->config = config;
 241         state->voltage = 0;
 242         state->hi_band = 0;
 243
 244         /* create dvb_frontend */
 245         memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
 246         state->frontend.demodulator_priv = state;
 247         return &state->frontend;
 248 }
 249
 250 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
 251         .delsys = { SYS_DVBT },
 252         .info = {
 253                 .name                   = "TechnoTrend/Hauppauge DEC2000-t Frontend",
 254                 .frequency_min          = 51000000,
 255                 .frequency_max          = 858000000,
 256                 .frequency_stepsize     = 62500,
 257                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 258                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 259                         FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 260                         FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
 261                         FE_CAN_HIERARCHY_AUTO,
 262         },
 263
 264         .release = ttusbdecfe_release,
 265
 266         .set_frontend = ttusbdecfe_dvbt_set_frontend,
 267
 268         .get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,
 269
 270         .read_status = ttusbdecfe_dvbt_read_status,
 271 };
 272
 273 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
 274         .delsys = { SYS_DVBS },
 275         .info = {
 276                 .name                   = "TechnoTrend/Hauppauge DEC3000-s Frontend",
 277                 .frequency_min          = 950000,
 278                 .frequency_max          = 2150000,
 279                 .frequency_stepsize     = 125,
 280                 .symbol_rate_min        = 1000000,  /* guessed */
 281                 .symbol_rate_max        = 45000000, /* guessed */
 282                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 283                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 284                         FE_CAN_QPSK
 285         },
 286
 287         .release = ttusbdecfe_release,
 288
 289         .set_frontend = ttusbdecfe_dvbs_set_frontend,
 290
 291         .read_status = ttusbdecfe_dvbs_read_status,
 292
 293         .diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
 294         .set_voltage = ttusbdecfe_dvbs_set_voltage,
 295         .set_tone = ttusbdecfe_dvbs_set_tone,
 296 };
 297
 298 MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
 299 MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
 300 MODULE_LICENSE("GPL");
 301
 302 EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
 303 EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);